US7512396B2 - Apparatus and method for reducing power consumption in digital broadcast receiver - Google Patents
Apparatus and method for reducing power consumption in digital broadcast receiver Download PDFInfo
- Publication number
- US7512396B2 US7512396B2 US11/500,121 US50012106A US7512396B2 US 7512396 B2 US7512396 B2 US 7512396B2 US 50012106 A US50012106 A US 50012106A US 7512396 B2 US7512396 B2 US 7512396B2
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- US
- United States
- Prior art keywords
- broadcast
- power
- signals
- decoder
- display unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to an apparatus and method for reducing power consumption in a digital broadcast receiver, and more particularly, to an apparatus and method for reducing the total power consumption in a broadcast receiver by interrupting power supply to unnecessarily-operated blocks of the broadcast receiver.
- a demand for a digital broadcast receiver e.g., a set top box
- supply of the digital broadcast receiver increases greatly.
- Korean Patent No. 0393574 Korean Patent No. 0386246, and Korean Patent Publication No. 2005-0000823 disclose a device (circuit) for reducing standby power of an electronic device.
- Korean Patent No. 0386246, and Korean Patent Publication No. 2005-0000823 disclose a device (circuit) for reducing standby power of an electronic device.
- researches on a method for reducing the total power consumption in the digital broadcast receiver are insufficient.
- a tuner and a decoder are the main components that generate a great amount of heat and consume much power. Moreover, the tuner and the decoder unnecessarily consume the power even in a standby state.
- the present invention provides an apparatus and method for reducing the total power consumption in a broadcast receiver by interrupting power supply to a broadcast receiving tuner unit and a decoder in the broadcast receiver when the broadcast receiving tuner unit and the decoder need not operate.
- an apparatus for reducing power consumption in a digital broadcast receiver includes: an AC-to-DC converter for converting AC power input to the digital broadcast receiver into DC power that can be used in the digital broadcast receiver; a power control switch for selectively supplying the DC power from the AC-to-DC converter to a tuner unit and a decoder according to a command of a controller; the tuner unit for receiving broadcast channel signals and demodulating the received broadcast channel signals in accordance with the respective broadcast formats; the decoder for receiving the demodulated broadcast signals from the tuner unit and decoding analog/digital broadcast signals; a multimedia output port connected between the decoder and the a display unit to transfer the audio/video output signals from the decoder to the display unit; and the controller for detecting the state of the display unit through the multimedia output port to control whether to supply the DC power through the power control switch.
- an apparatus for reducing power consumption in a digital broadcast receiver including: an AC-to-DC converter for converting AC power input to the digital broadcast receiver into DC power that can be used in the digital broadcast receiver; a power control switch for selectively supplying the DC power from the AC-to-DC converter to a tuner unit and a broadcast distributor according to a command of a controller; the tuner unit for receiving broadcast channel signals and demodulating the received broadcast channel signals in accordance with the respective broadcast formats; the broadcast distributor for receiving the signals from the tuner unit and transferring the received signals to an external A/V player through a transfer interface; and the controller for commanding the power control switch to interrupt power supply to the tuner unit and the broadcast distributor, when receiving a request for termination of a broadcast service from the external A/V player.
- an apparatus for reducing power consumption in a digital broadcast receiver including: an AC-to-DC converter for converting AC power input to the digital broadcast receiver into DC power that can be used in the digital broadcast receiver; a power control switch for selectively supplying the DC power from the AC-to-DC converter to one or more tuner units, a broadcast distributor and a decoder according to a command of a controller; the tuner units for receiving one or more broadcast channel signals and demodulating the received broadcast channel signals in accordance with the respective broadcast formats; the decoder for receiving the demodulated broadcast signals from the tuner units and decoding analog/digital broadcast signals; the broadcast distributor for receiving the signals from the tuner units and transferring the received signals to an external A/V player through a transfer interface; a multimedia output port connected between the decoder and the a display unit to transfer the audio/video output signals from the decoder to the display unit; and the controller for controlling whether to supply the DC power through the power control switch, by detecting the state
- a method for reducing power consumption in a digital broadcast receiver including the steps of: supplying DC power to a controller and a power control switch through an AC-to-DC converter for converting AC power into DC power; determining whether to supply the DC power through the power control switch by detecting the state of a display unit through a multimedia output port; transmitting a power supply interrupting command to the power control switch when the display unit is in a standby state; and receiving, at the power control switch, the power supply interrupting command, to interrupt power supply to a tuner unit.
- FIG. 1 is a block diagram of a power-saving broadcast receiver according to a first embodiment of the present invention, which can turn on/off power supply to a broadcast receiving tuner unit and a decoder depending on whether the broadcast receiving tuner unit and the decoder need operate;
- FIG. 2 is a block diagram of a power-saving broadcast receiver according to a second embodiment of the present invention, which can turn on/off power supply to a broadcast receiving tuner unit and a broadcast distributor depending on whether the broadcast receiving tuner unit and the broadcast distributor need operate;
- FIG. 3 is a block diagram of a power-saving broadcast receiver according to a third embodiment of the present invention, which can turn on/off power supply to a broadcast receiving tuner unit and a broadcast distributor depending on whether the broadcast receiving tuner unit and the broadcast distributor need operate;
- FIG. 4 is a flowchart illustrating a method for reducing power consumption in the broadcast receiver according to an embodiment of the present invention.
- the present invention interrupts power supply to unnecessarily-operated blocks of a digital broadcast receiver to reduce power consumption in the digital broadcast receiver.
- the present invention proposes an apparatus and method for reducing the total power consumption in a broadcast receiver having a structure where broadcast signals are transferred to a display unit through a DVI/HDMI (digital video interface/high definition multimedia interface) port or a structure where distributed broadcast signals are transferred to an external player through an external transfer interface, by interrupting power supply to unnecessarily-operated blocks (e.g., a tuner unit, a demodulator, and a decoder) of the broadcast receiver.
- unnecessarily-operated blocks e.g., a tuner unit, a demodulator, and a decoder
- the present invention provides an apparatus and method capable of reducing power consumption in a digital broadcast receiver.
- the apparatus includes: a tuner unit (including a demodulator) for selecting a physical channel of a digital broadcast; an MPEG (moving picture experts group) decoder for receiving the output signals from the tuner unit and decoding MPEG signals; a DVI/HDMI port for transferring A/V (audio/video) signals from the MPEG decoder to a display unit; a power supply unit for supplying power to all components of the digital broadcast receiver; a switch (or a relay) for selectively supplying power to digital broadcast tuners; a power controller for detecting the state of the display unit through a HotPlugDetect pin of the DVI/HDMI port; and the display unit capable of displaying its own state using the HotPlugDetect pin.
- a tuner unit including a demodulator
- MPEG moving picture experts group
- DVI/HDMI port for transferring A/V (audio/video) signals from the MPEG decoder to a
- the present invention detects the off state of the HotPlugDetect pin to interrupt power supply to the tuner unit, the MPEG decoder or a broadcast distributor, which receive broadcast signals transferred to the display unit.
- an apparatus for reducing power consumption in a broadcast receiver includes: an AC-to-DC converter for converting AC power into DC power; a power control switch for selectively supplying the DC power to internal components of the broadcast receiver; tuner unit (including a demodulator) for tuning and demodulating broadcast signals in accordance with a specific broadcast channel; a decoder for decoding the demodulated signal from the tuner unit; a broadcast distributor for distributing the broadcast signals from the tuner unit; a transfer interface for transferring the distributed broadcast signals to other corresponding components; and a controller for controlling the power control switch by detecting the state of a display unit to determine whether to supply power to the tuner unit, the decoder or the broadcast distributor.
- FIG. 1 is a block diagram of a power-saving broadcast receiver according to a first embodiment of the present invention, in which detailed illustration of peripheral circuits and components for a broadcast receiving operation is omitted for conciseness.
- a power-saving broadcast receiver 100 includes an AC-to-DC converter 101 , a power control switch 102 , a controller 105 , a broadcast receiving tuner unit 103 , a decoder 104 , and a DVI/HDMI port 106 , which interwork with one another.
- AC power is input to the AC-to-DC converter 101 of the power-saving broadcast receiver 100 .
- the AC-to-DC converter 101 converts the AC power into DC power that can be used in the power-saving broadcast receiver 100 .
- the voltage control switch 102 supplies the DC power from the AC-to-DC converter 101 to the broadcast receiving tuner unit 103 and the decoder 104 .
- the broadcast receiving tuner unit 103 includes a demodulator (not illustrated).
- the broadcast receiving tuner unit 103 receives terrestrial broadcast channel signals, cable broadcast channel signals, or satellite broadcast channel signals, demodulates the received channel signals according to the respective broadcast formats, and outputs the resulting signals to the decoder 104 .
- the decoder 104 decodes analog/digital broadcast signals and processes video/audio/data signals.
- the processed video/audio/data signals are outputted to a display unit 107 .
- the display unit 107 displays the processed video/audio/data signals from the decoder 104 .
- the DVI/HDMI port is a kind of multimedia output port.
- the DVI/HDMI port 106 serves to connect the decoder 104 to the display unit 107 to transfer the video/audio signals from the decoder 104 to the display unit 107 .
- the DVI/HDMI port 106 also functions to inform, through a HotPlugDetect pin, whether the display unit 107 is connected. That is, information about whether the display unit 107 is connected is transferred through the DVI/HDMI port 106 to the controller 105 .
- the use of the HotPlugDetect pin is expanded such that a signal with a predetermined level for indicating the off state of the HotPlugDetect pin is generated when the display unit 107 is in a standby state.
- the standby state is a state where a user does not use the display unit 107 .
- the HotPlugDetect pin is turned off to inform the power-saving broadcast receiver 100 that broadcasting is not being viewed.
- the controller 105 detects, through the DVI/HDMI port 106 , whether the display unit 107 is connected and is in the standby state. When the display unit 107 is connected and is in the standby state, the controller 105 commands the power control switch 102 to supply the DC power to the broadcast receiving tuner unit 103 and the decoder 104 .
- FIG. 4 is a flowchart illustrating a method for reducing power consumption in the broadcast receiver according to an embodiment of the present invention.
- step S 401 DC power is supplied through the AC-to-DC converter 101 to the controller 105 and the power control switch 102 .
- step S 402 using the HotPlugDetect of the DVI/HDMI port 106 , the controller 105 detects the state of the display unit 107 to send a power supply control command to the power control switch 102 .
- the power supply control command is a command for controlling whether to supply the DC power to the broadcast receiving tuner unit 103 or the decoder 104 .
- the power control switch 102 operates to turn on or off the DC power supply to the broadcast receiving tuner unit 103 or the decoder 104 .
- step S 403 it is determined whether the display unit 107 is in a standby state. If the display unit 107 is in a standby state, the method proceeds to step S 405 , and if not, the method proceeds to step S 404 .
- step S 404 it is determined whether an external interface (not illustrated) is used to perform a playing operation. Examples of the external interface are USB, IEEE1394, Ethernet, WLAN, UWB, DVD drive, and HDD. If the external interface is used to perform a playing operation, the method proceeds to step S 405 , and if not, the method proceeds to step S 406 . In operation S 405 , power supply to the broadcast receiving tuner unit 103 is interrupted.
- step S 406 it is determined whether the decoder 104 is being used. If the decoder 104 is being used, the method ends, and if not, the method proceeds to step S 407 . In step S 407 , power supply to the decoder 104 is interrupted.
- the power control switch 102 operates to supply the DC power to the broadcast receiving tuner unit 103 and the broadcast receiving tuner unit 103 .
- the power-saving broadcast receiver 100 detects the standby state through the DVI/HDMI port 106 to interrupt power supply to the broadcast receiving tuner unit 103 (step S 405 ). In this state, when the decoder 104 is not being used for other purposes (step S 406 ), power supply to the decoder 104 is also interrupted (step S 407 ).
- the broadcast receiving tuner unit 103 need not be used. In this case, even when the HotPlugDetect pin is in an on state, power supply to the broadcast receiving tuner unit 103 is interrupted (step S 405 ).
- the standby state of the display unit 107 may be linked with that of the power-saving broadcast receiver 100 . That is, when the display unit 107 is converted to the standby state, the controller 105 of the power-saving broadcast receiver 100 detects the standby state of the display unit 107 through the DVI/HDMI port 106 to interrupt power supply to other components than the AC-to-DC converter 101 and the controller 105 , such that the power-saving broadcast receiver 100 also enter the standby sate. On the other hand, when the display unit 107 is converted from a standby state to a normal operation state, the power-saving broadcast receiver 100 is also converted from a standby state to a normal operation state under the control of the controller 105 .
- the DVI/HDMI port 106 may be any multimedia port that can support the HotPlugDetect pin.
- FIG. 2 is a block diagram of a power-saving broadcast receiver according to a second embodiment of the present invention.
- a power-saving broadcast receiver 200 uses a broadcast distributor 210 instead of the decoder 104 of the power-saving broadcast receiver 100 .
- the broadcast distributor 210 receives signals from the broadcast receiving tuner unit 103 , and transfers the received signals to internal and external players through a transfer interface.
- the transfer interface may be any interface such as IEEE 1394, UBS, Ethernet, WLAN, and UWB, which can be used in computers and home appliances.
- the decoder 104 of FIG. 1 may be regarded as being included in an A/V player (or a mobile player) 202 of FIG. 2 .
- the AC-to-DC converter 101 converts AC power into DC power and supplies the DC power to the power control switch 102 and the controller 105 .
- Broadcast channel signals from the broadcast receiving tuner unit 103 are transferred through the broadcast receiving tuner unit 103 are transferred through the broadcast distributor 210 and the transfer interface to the A/V player 202 .
- the A/V player 202 decodes the broadcast channel signals and transfers the resulting signals to the display unit 107 .
- Power is supplied to the broadcast receiving tuner unit 103 and the broadcast distributor 201 in the normal operation state.
- the controller 105 interrupts power supply to the broadcast receiving tuner unit 103 and the broadcast distributor 210 .
- the broadcast receiving tuner unit 103 includes one or more tuners, power supply is interrupted with respect to only a tuner that is not being used and power is supplied to the broadcast distributor 210 , thereby saving power to be otherwise supplied to the tuner that is not being used.
- FIG. 3 is a block diagram of a power-saving broadcast receiver according to a third embodiment of the present invention.
- a power-saving broadcast receiver 300 is the combination of the power-saving broadcast receivers 100 and 200 .
- the power-saving broadcast receiver 300 includes two or more broadcast receiving tuner units 301 and 302 .
- the first and second broadcast receiving tuner units 301 and 302 are all connected to the broadcast distributor 201 and the decoder 104 .
- the broadcast distributor 201 receives broadcast signals from the first and second broadcast receiving tuner units 301 and 302 , processes the received broadcast signals, and supplies the processed broadcast signals to the A/V player 202 through an transfer interface.
- the decoder 104 receives broadcast signals form the first and second broadcast receiving tuner units 301 and 302 , decodes the received broadcast signals, and transfers the resulting signals to the display unit 107 through the DVI/HDMI port 106 .
- the AC-to-DC converter 101 converts AC power into DC power, and always supplies the DC power to the power control switch 102 and the controller 105 .
- the power control switch 102 selectively supplies the DC power to the first and second broadcast receiving tuner units 301 and 302 , the decoder 104 , and the broadcast distributor 201 .
- the first and second broadcast receiving tuner units 301 and 302 selects broadcast channels according to a user's request, and transfers the corresponding broadcast signals to the broadcast distributor 201 or the decoder 104 .
- the broadcast distributor 201 transfers the broadcast signals from the first and second broadcast receiving tuner units 301 and 302 to the A/V player 202 .
- the decoder 104 decodes the broadcast signals form the first and second broadcast receiving tuner units 301 and 302 , and transfers the resulting signals to the display unit 107 through the DVI/HDMI port 106 .
- the controller 105 detects such conditions to interrupt power supply to the first and second broadcast receiving tuner units 301 and 302 that were being used by the display unit 107 . For example, when the A/V player 202 receives a request for termination of a service of a broadcast channel that is being received, the controller 105 interrupts power supply to the broadcast receiving tuner units 301 and 302 corresponding to the above broadcast channel.
- the present invention detects the disconnected or standby state of the display unit through the HotPlugDetect pin of the DVI/HDMI port to interrupt power supply to the tuner providing the corresponding channel signal, thereby making it possible to reduce the power consumption in the broadcast receiver.
- the controller of the present invention detects such conditions to interrupt power supply to the corresponding tuner, thereby making it possible to reduce the power consumption in the broadcast receiver.
- the present invention interrupts power supply to the broadcast distributor and the decoder, thereby making it possible to reduce the power consumption in the broadcast receiver.
Abstract
Description
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020050110850A KR100734623B1 (en) | 2005-11-18 | 2005-11-18 | Apparatus and method for reducing power consumption in a digital broadcast receiver |
KR2005-0110850 | 2005-11-18 |
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US20070117533A1 US20070117533A1 (en) | 2007-05-24 |
US7512396B2 true US7512396B2 (en) | 2009-03-31 |
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US11/500,121 Expired - Fee Related US7512396B2 (en) | 2005-11-18 | 2006-08-07 | Apparatus and method for reducing power consumption in digital broadcast receiver |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20090002568A1 (en) * | 2007-06-29 | 2009-01-01 | Kabushiki Kaisha Toshiba | Information processor, control method and display system of the same |
US20100165197A1 (en) * | 2007-10-31 | 2010-07-01 | Satoshi Hattori | Display processing apparatus |
US20100164742A1 (en) * | 2008-12-31 | 2010-07-01 | L3 Communications Integrated Systems, L.P. | Activation circuit for sealed electronic device |
US20110113264A1 (en) * | 2009-11-11 | 2011-05-12 | Samsung Electronics Co., Ltd. | Method and apparatus for network communications over hdmi in standby mode |
US8838845B2 (en) | 2011-09-23 | 2014-09-16 | Qualcomm Incorporated | Multimedia interface with content protection in a wireless communication device |
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EP2950528A1 (en) * | 2006-11-07 | 2015-12-02 | Sony Corporation | Video signal transmitting device |
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US8201210B2 (en) | 2008-09-04 | 2012-06-12 | At&T Intellectual Property I, L.P. | Method and system for a media processor |
US8321906B2 (en) | 2008-09-11 | 2012-11-27 | At&T Intellectual Property I, Lp | Method and system for a transcoder |
US8555094B2 (en) | 2008-10-16 | 2013-10-08 | Dell Products L.P. | System and method for managing power consumption of an information handling system based on the information handling system power state and battery status |
TWI396071B (en) * | 2008-11-14 | 2013-05-11 | Himax Media Solutions Inc | Standby circuit and method for a display device |
KR200451976Y1 (en) * | 2010-04-23 | 2011-01-25 | (주)휴톤 | Power-saving broadcast retransmission device |
WO2011145700A1 (en) * | 2010-05-19 | 2011-11-24 | シャープ株式会社 | Reproduction device, display device, television receiver, system, recognition method, program, and recording medium |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20090002568A1 (en) * | 2007-06-29 | 2009-01-01 | Kabushiki Kaisha Toshiba | Information processor, control method and display system of the same |
US20100165197A1 (en) * | 2007-10-31 | 2010-07-01 | Satoshi Hattori | Display processing apparatus |
US20100164742A1 (en) * | 2008-12-31 | 2010-07-01 | L3 Communications Integrated Systems, L.P. | Activation circuit for sealed electronic device |
US8258959B2 (en) * | 2008-12-31 | 2012-09-04 | L3 Communications Integrated Systems, L.P. | Activation circuit for sealed electronic device |
US20110113264A1 (en) * | 2009-11-11 | 2011-05-12 | Samsung Electronics Co., Ltd. | Method and apparatus for network communications over hdmi in standby mode |
US8332674B2 (en) * | 2009-11-11 | 2012-12-11 | Samsung Electronics Co., Ltd. | Method and apparatus for network communications over HDMI in standby mode |
US8838845B2 (en) | 2011-09-23 | 2014-09-16 | Qualcomm Incorporated | Multimedia interface with content protection in a wireless communication device |
Also Published As
Publication number | Publication date |
---|---|
US20070117533A1 (en) | 2007-05-24 |
KR20070052983A (en) | 2007-05-23 |
KR100734623B1 (en) | 2007-07-03 |
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